A wireless charging system for electric vehicles includes an AC-to-DC converter connectable to an electric AC grid; a DC-to-AC converter interconnected with the AC-to-DC converter; a first inductive coil interconnected with the DC-to-AC converter and for inductively coupling to a second inductive coil for power transfer via an air gap; a first housing, in which the AC-to-DC converter is arranged; a second housing, in which the DC-to-AC converter and the inductive coil are arranged; and a cable for interconnecting the AC-to-DC converter and the DC-to-AC converter outside of the first housing and second housing.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The wireless charging system of claim 1, wherein the first controller and/or the second controller are adapted for controlling a power transfer between the AC-to-DC converter and the DC-to-AC converter by varying a DC link voltage of a DC link between the AC-to-DC converter and the DC-to-AC converter.
4. The wireless charging system of claim 3, wherein the first controller receives a power demand of the second controller via the signal line and determines the variable setpoint voltage from the power demand.
7. The wireless charging system of claim 1, wherein the second controller is adapted to control a duty cycle and/or a frequency of an AC voltage provided to the first inductive coil.
8. The wireless charging system of claim 1, wherein the second housing is a ground adapter for being placed in the ground of a parking lot for an electric vehicle.
9. The wireless charging system of claim 1, wherein a compensation capacitor, which is interconnected between the DC-to-AC converter and the first inductive coil, is arranged inside the second housing.
10. The wireless charging system of claim 1, wherein a DC link with a DC link capacitor, which is interconnected between the AC-to-DC converter and the DC-to-AC converter, is arranged inside the first housing.
11. The wireless charging system of claim 1, wherein the DC-to-AC converter is a full-bridge converter.
12. The wireless charging system of claim 1, wherein the AC-to-DC converter comprises a boost converter and/or a passive rectifier.
13. The wireless charging system of claim 1, wherein the AC-to-DC converter comprises a full-bridge converter.
16. The wireless charging system of claim 6, wherein the second controller is adapted to control a duty cycle and/or a frequency of an AC voltage provided to the first inductive coil.
17. The wireless charging system of claim 16, wherein the second housing is a ground adapter for being placed in the ground of a parking lot for an electric vehicle.
18. The wireless charging system of claim 17, wherein a compensation capacitor, which is interconnected between the DC-to-AC converter and the first inductive coil, is arranged inside the second housing.
19. The wireless charging system of claim 18, wherein a DC link with a DC link capacitor, which is interconnected between the AC-to-DC converter and the DC-to-AC converter, is arranged inside the first housing.
20. The wireless charging system of claim 2, wherein the first controller is adapted to control a DC link voltage to a variable setpoint voltage.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
January 27, 2020
August 30, 2022
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.